// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_PERFTESTS_MEASUREMENTS_H_
#define GPU_PERFTESTS_MEASUREMENTS_H_

#include <string>

#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"

namespace gfx {
class GPUTimingClient;
class GPUTimer;
}

namespace gpu {

struct Measurement {
    Measurement();
    Measurement(const Measurement& m);
    Measurement(const std::string& name,
        const base::TimeDelta wall_time,
        const base::TimeDelta cpu_time,
        const base::TimeDelta gpu_time);
    ~Measurement();

    void PrintResult(const std::string& graph) const;
    Measurement& Increment(const Measurement& m);
    Measurement Divide(int a) const;

    std::string name;
    base::TimeDelta wall_time;
    base::TimeDelta cpu_time;
    base::TimeDelta gpu_time;
};

// Class to measure wall, cpu and gpu time deltas.
// The deltas are measured from the time of the object
// creation up to when Record is called.
class MeasurementTimers {
public:
    explicit MeasurementTimers(gfx::GPUTimingClient* gpu_timing_client);
    void Record();
    Measurement GetAsMeasurement(const std::string& name);
    ~MeasurementTimers();

private:
    base::TraceTicks wall_time_start_;
    base::ThreadTicks cpu_time_start_;
    scoped_ptr<gfx::GPUTimer> gpu_timer_;

    base::TimeDelta wall_time_;
    base::TimeDelta cpu_time_;
};

} // namespace gpu

#endif // GPU_PERFTESTS_MEASUREMENTS_H_
